PNA

PNA or Pna has a variety of meanings:

Science and engineering

 * abbreviation for orchid genus Paphinia
 * Pacific–North American teleconnection pattern, a climatic phenomenon
 * Parisiensia Nomina Anatomica, the revision of anatomic nomenclature
 * Peanut agglutinin, a lectin specific for Gal-β(1–3)-GalNAc
 * Peptide nucleic acid, an artificially synthesized polymer similar to DNA or RNA.
 * Plastic neutral axis, an engineering value used in plastic section modulus
 * Pottery Neolithic A, a division of the Pottery Neolithic period in archaeology

Organizations

 * Pakistan National Alliance
 * Palestinian National Authority, an administrative autonomous government in parts of the West Bank and the Gaza Strip
 * Partido Nacional Agrarista (National Agrarian Party), a Mexican left-wing agrarian political party founded in 1920
 * Partidul Național-Agrar (National Agrarian Party), a Romanian right-wing agrarian political party active in the 1930s
 * Project for Nuclear Awareness, a non-profit organization that advocates for the abolition of nuclear weapons, co-founded by John C. Haas
 * Polish National Alliance, a non-profit organization, the largest Polish – American Fraternal Benefit Society in USA offering life insurance and annuities. Founded in 1880, operates solely for the benefit of its members.
 * Pa-O National Army
 * Partido Nueva Alianza, the Spanish name for the New Alliance Party (Mexico)
 * Parties to the Nauru Agreement
 * Pennsylvania NewsMedia Association
 * Philippine Nurses Association
 * Prefectura Naval Argentina, the Spanish name for the Argentine Naval Prefecture
 * National Anticorruption Directorate, Romania; formerly, National Anticorruption Prosecution Office (PNA)

Computing

 * HomePNA, a home-computer networking standard
 * Personal navigation assistant (PNA)

Other

 * Pacific Northern Airlines, acquired by Western Airlines in 1967
 * Pamplona Airport
 * Partial nail avulsion, a treatment of ingrown toenails
 * Philippine News Agency
 * Prenuptial agreement, a marriage contract